It's a common science fiction trope. But it's not really possible, the reason being that you can trace a continuous fossil history of the early hominids.

Smithsonian Artist Brings Faces from Past to Life

There is no way that a species that evolved around another star could happen to fit exactly into that sequence, same bones, same DNA, same everything.

Indeed we share most of our DNA with chimpanzees and gorillas. Chimps, Humans 96 Percent the Same, Gene Study Finds

So even if you supposed that the human immigrants came from another planet that had exactly the same biochemistry as Earth, used DNA just like us, same bases, same translation table to amino acids, same chirality (not mirror DNA), same backbone etc etc - it's not at all likely that they also had the same pattern of bones, and impossible that their DNA is almost identical to great apes or chimpanzees DNA.